A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

What number do you get when you multiply all of the numbers on a telephone's number pad?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Which tank will fill first?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?